Butler Creek Scope cap size list

In order to find the correct scope cover you need, measure the outside diameter of your scope in inches. (For example, 1.225 inches).
If your measurement falls between two sizes, choose the smaller of the two that are available.

I tried so many places to get a Butler Creek scope cap (No. 54) for my Big Nikko and had absolutely no success...I am almost lead to believe that even though its a listed size, its also a discontinued product. I eventually sourced a flip open scope cap...a Weaver Polar size W.